On the best constant for the Friedrichs-Knapp-Stein inequality in free nilpotent Lie groups of step two and applications to subelliptic PDE
نویسندگان
چکیده
In this paper we propose to find the best constant for the Friedrichs-KnappStein inequality in F2n,2, that is the free nilpotent Lie group of step two on 2n generators, and to prove the second order differentiability of subelliptic p-harmonic functions in an interval of p.
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